//
//  MainTabBar.swift
//  weibo
//
//  Created by apple on 16/1/13.
//  Copyright © 2016年 apple. All rights reserved.
//

import UIKit

class MainTabBar: UITabBar {

    override init(frame:CGRect){
        
        super.init(frame:frame)
        
   addSubview(plusBtn)
    
    }

    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        let w = self.bounds.width/5
        let h = self.bounds.height
        let rect = CGRectMake(0, 0, w, h)
        var index:CGFloat = 0
        for subview in subviews{
        
    if subview.isKindOfClass(NSClassFromString("UITabBarButton")!){
            
            subview.frame = CGRectOffset(rect,index * w , 0)
            
        index += (index == 1 ? 2 : 1)
        
            }
        }
        plusBtn.frame = CGRectOffset(rect, 2 * w, 0)
           }
    
    
    
   //懒加载获取加号按钮
    lazy var plusBtn:UIButton = {
        
    let btn = UIButton()
        
  btn.setBackgroundImage(UIImage(named: "tabbar_compose_button"), forState:.Normal)
  btn.setBackgroundImage(UIImage(named: "tabbar_compose_button_highlighted"), forState: .Normal)
    btn.setImage(UIImage(named: "tabbar_compose_icon_add"), forState: .Normal)
    btn.setImage(UIImage(named: "tabbar_compose_icon_add_highlighted"), forState: .Normal)
        btn.sizeToFit()
    return  btn
        
    }()
    

}
